How do you recompile a jar file?

Question

I took an old jar file and edited it. Now i have a folder that has all the files and I want to recompile them back to a jar file. How do i do this?

Answer 1

Jar files aren't "compiled" in the normal sense of the word. But you just create one with the jar command:

jar cvf myfile.jar file1 file2 etc

You can use globbing as normal:

jar cvf ../myfile.jar *

Run jar -? or read the docs for more information.

Note that for an executable jar file, you'll need to specify the manifest file as well.